Device for gauging and cutting slot insulation members



April 2.o, 1954 W, FwElRicH ETAL 2,675,873

DEVICE FOR GAUGING AND CUTTING SLOT INSULATION MEMBERS Filed May 18, 195o 3 Sheets-Sheet l .EWI

April 20, 1954 DEvIcE FOR GAUGING AND CUTTING sLoT INSULATION MEMBERS Filed Nay 18, 195o 2 m. EN .I mnw IMM QN//r `1 I mmJRH/M/MiXNT/MJN@ I..

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April'ZO, 1954 w. F. wElRlcH ETAL 2,675,873

DEVICE FOR GAUGING AND CUTTING SLOT INSULATION MEMBERS Filed May 18, 195o 3 sheets-sheet 3 Patented Apr. 20, 1954 UNITED STATE ENT OFFICE DEVICE FOR- GAUGING AND CUTTNG SLOT INSULATION MEMBERS William F. Weirich, Philadelphia, and Henry Weirich, Lenni, Pa.

Claims.

This invention relates to a novel device for cutting and forming slot insulation members to be used in the winding slots of electrical machines such as electric motors. As formed by our novel device, such members are cut to size and are creased so that they may be easily inserted in the winding slots of a machine.

One object of the invention is to provide a simple, highly efficient and easily operable device for cutting and forming such creased menibers from a band or strip of material.

Another object of the invention is to provide such a, device having provision for adjustment to vary the size of the cut members at will and also to vary the location of the crease or creases therein.

Still another object of the invention is to provide a device of the above-mentioned character wherein the parts are readily removable for replacement.

Other objects and features of the invention will be apparent fromY the detailed description which follows.

It is the practice to supply slot insulation material to users in band or strip form and in a roll. The rolled band is composed of special paper having substantial stiiiness, and the band has its longitudinal edges turned or folded in wardly to provide longitudinal side anges. In the past, it has been necessary for the user to cut successive pieces carefullyA from the band or strip and then carefully t each cut piece to the winding slot in which it is to be used, it being necessary to crease the piece so that it will seat in the slot and form an insulating liner therein. This has been a cumbersome, time-consuming and expensive procedure, not to mention possible inaccuracy of the manual operations involved.

By the present invention, there is provided a novel device which is easily operable and which is adapted to out and form successive members from a band or strip accurately and rapidly. The device supplies these members properly creased to t the winding slots, and the user has only to insert the members in the slots. The device effects great saving in time, energy and cost of producing such members from the band or strip material.

The invention may be fully understood by reiference to the accompanying drawings wherein there is illustrated a preferred embodiment and whereinz Y Fig. 1 is a miniature perspective View showingA Vthe'clevice in operation. c

Fig. 2 is a plan view of the device, substantially on full scale;

Fig. 3 is a fragmentary sectional view taken on line 3--3 of Fig. 2;

Fig. 4 is a fragmentary sectional View taken on line d-t of Fig. 2;

Fig. 5 is a longitudinal sectional view taken on line 5-5 of Fig. 2;

Fig. 6 is a similar fragmentary sectional View showing the movable knife-carrying member in operative position;

Fig. 7 is an end elevational view taken from the left-hand end of the device as it appears in Fig. 2;

Fig. 8 is an end elevational view taken from the opposite end of the device;

Fig. 9 is a similar view, showing the movable member in operative position;

Fig. l0 is a fragmentary elevational view taken from the left side in Fig. 8;

Fig. 11 is a perspective view of a portion of the band or strip from which the slot insulation members are formed, showing the strip following a cutting and creasing operation and prior to the next operation; and

Fig. 12 is a perspective view of one of the slot insulation members. l

Referring more particularly to the drawings, there is provided a supporting base structure, designated generally by reference character i, which is adapted to receive a band or strip of material for the cutting and forming of slot insulation members as hereinafter described. This supporting structure preferably is of generally rectangular shape, as may be seen in Fig. 2, and it is adapted to be disposed horizontally. In the form illustrated, the structure comprises a table portion 2 and depending sides 3 and 4 (Figs. 7 and 8) which may have attachment lugs 5 and 6, adapted to rest on a horizontal surface such as indicated at l'. The lugs 5 and 6 may be provided with apertures, as shown. in Fig. 2, to receive fastening screws or the like for anchorage of the device. y

The sides 3 and i extend lbeyond the table portion 2, and at the extended ends of the sides there is provided a knife element 8 (Figs. 5 and 8) which may be in thesform oi a separated element removably secured to said ends by means of screws 9. The upper edge oi element 8, as may be seen in Fig. 5, is formed to provide a knife edge IB which extends fully across the end of the supporting base structure. Inr spaced relationto the knife element 8 and to each otherare two creasing elements Il and l2 (Fig-5) which are parallel to the associated knife element and which also extend the full width of the supporting base structure. These elements are provided with blunt upper edges l and ill respectively, and their purpose is to crease the tape or strip transversely thereof during operation of the device as hereinafter described. These creasing elements are adjustably supported on the base structure so that they are individually adjustable.

As may be seen in Fig. 5, the creasing ele ment I! is secured, for example by welding, to a supporting plate it, and the creasing element I2 is similarly secured to a supporting plate le. As may :be seen in Figs. 3 and the supporting base structure has a pair of side shoulders Ha and I'ib, and each of the creasing elements l! and i2 has side extensions Hic and i329 which slidably rest on said shoulders. To assure seating of the extensions on the shoulders, a screw i9 (Fig. 5) depends from table 3 to prevent upward movement of the upper plate i5, and a screw lea extends upward from plate i to prevent the latter from rising. The supporting plates Iii and it for the creasing elements extend toward. the opposite end oi the device, and these platesv carry laterallwextending threaded members 20 and 2l (Fig. 2) respectively through which screws 22 and 23 extend. At their inner unthreaded ends, the screws are rotatably supported by brackets 2li and 25, and at their outer ends, the screws carry knurled heads 2t and 2l xed thereon by which the screws may be manually turned, although there is no longitu `inal movement of either screw. As shown 7, the side of plate i5 opposite the member is slidably supported in a recess of bracket The side of plate lo opposite member 2i likewise is slide-bly supported in a recess of bracket Springs 8 and 2S are anchored to a fixed bolt sii on the base structure and engage the plates iii and it at 3i and 32, respectively. These springs may be parts of a single spring member or they may be two separate springs. They serve to urge the respective creasing elements and their supporting platesv rearwardly, while the threaded nut-like elements 2! and 2i on the supporting plates esu tablish the respective positions of the plates, and hence the positions of the creasing elements il and l 2. By rotating the screws 'Z3 through the medium of the hnurled heads and 2l, the creasing elements are individually adjustable in relation to each other and to the xed knife element 8.

The table portion 2 (Fig. of the supporting base provides a horizontal. surface along which the band or strip, shown at may be moved. At one side of the table surface, there is provided a fixed guide 31S which is removably secured to the supporting structure by means of screws 35. Transversely of the table portion is a slot 3E through which a bolt 3l extends, the latter being provided with a wing nut 3S. An adjustable guide 39 is movable transversely ci the table portion 2 and is held in any position of adjustment by means of the bolt 3l which extends through said guide. The two guides .Gt and 39 serve to guide the band or strip 33 in proper relation to the cutting and creasing elements during the operation of the device as hereinafter described.

As may be seen in Figs. 2 and :3, at one side of the supporting base structure in cooperative relation with the knife element 3 and the creasing elements H and la, there is provided an arm all which is pivoted on the extended side 4 by means of a pivot pin 4l and which extends beyond the knife element 8. This arm carries a stop which is adjustably supported on the arm f means of a yoke 43 and an associated wing scr 1M. The arm Ml is provided with a recess or liti along its inner side to receive the strip 33 Which abuts against the stop as. the mouth end of the slot there is an up wardly turned f nger et (Fig. 5) to insure entrance of one edge of the band or strip iro said slot. The purpose of the stop to si p the band or strip inY proper position certain length thereof will be cut dur operation of the device. The arm is inwardly by means of a spring f (see which is Wound about a pin i8 supporte extended side Ai, one end of the sin. turned as at 4Q to engage said side, other end of the spring extending into an in the arm 4!! as at 5G'. The spring ur6^ arm lie inwardly to its operative shown in Fig. 2, against the element and creasing elements. l owev arm is deflectible outwardly, against of the spring, as indicated by the dot representation in Fig. 2. To this end Sil is provided with an upwardly proj element 5|, the function oi which ..1 plained presently. The reason ier ou deflectibility of the arm dil is to enable piece of the band or strip 3E to fall ireei the cutting thereof.

Hingedly mounted on the supporting base structure is a transverse member (Figs. 2 and 8) which is hinged at the side o said structur opposite the side at which the arm iii is mount As may .be seen in Fig. 2, there are provided. spaced bearing supports 53 and Sil which are secured to the base structure i, for example by being welded thereto. These supports rotatably support a rod or shaft 55 to which the member 52 is secured, for example by welding attachment. The shaft 55 extends beyond support t3 and carries an end plate or disk secured a A helical spring iii surrounds the screw 5l. shaftl 55 and its ends abut against the bea. support 53 and the end pia-te 5t. This s takes up any lengthwise play of the shaft insures good cooperation between the ments which sever or shear the band or strip The hinged member 52 carries knife element which is removably secured to said member by screws 6B. This knife element has a depei ng knife edge 6i (see Fig. 5) which cooperates mth the knife edge it* of the stationary lnie element 8. Also mounted on the member s2 is a resilient pad 132 which serves, during operation of the device (Fig. 6), to press the band or strip against the creasing edges i3 and iii. The pad t2 may be formed of rubber, and it may be secured in any suitable manner, for example by cenienting it to a facing plate fastened to member 52 by screws. It should be noted that the resilient pad enables the creasing edges to perform their creasing function.

At the end of the transverse nieinber opposite the hinge mounting thereof, thee is provided an extension 63 to which a of arms 64 and 65 are pivoted at Secured to the arms B, 65, as by welding, is a handle which is preferably provided with a knob 53. Pivotaily secured to armsA Sli, 65 are a pair of arms and I0 which carry a roller 'ii (Figs. 8 and le) adapted to engage a hook 'i2 projecting from the extended side 4. A retaining cylinder 13 is eccentrically mounted on a projecting screw pin 14 below hook 12, and a spring 15 surrounds said pin and is disposed in a recess in the cylinder 13, this spring urging the cylinder into firm engagement with the side of the supporting base. A recess 16 in the base and a cooperating detent 11 on the cylinder 13 serve to establish the operative position of the cylinder. By pulling the cylinder outward against the action of spring 15 sufliciently to remove detent 11 from recess 16, the eccentrically mounted cylinder may be rotated to permit removal of the roller 1| from under the hook 12. This permits the hinged member 52 to be moved out of the way whenever it is desired to adjust the elements on the supporting base structure.

During operation of the device, the roller 1l is held beneath the hook 12, and the movable member 52 is actuated by manipulation of the handle. During closing movement of the member 52, the handle 61 is swung inwardly and is brought down against a cushion stop 18 which is mounted on top of the member 52, as may be clearly seen in Figs. 8 and 9. Such movement of the handle causes lowering of the knife element 59. Reverse movement of the handle causes raising of said knife element.

Referring particularly to the cutting and creasing operation, a previously creased portion of the band or strip 33 is severed, and at the same time the adjacent portion of the band is creased. With the hinged member 52 in raised position, the operator moves the band or strip 33 until its end abuts against the stop 42, and then actuates the handle 51 to effect downward movement of member 52. As this member lowers, the knife elements 8 and 59 sever the projecting portion of the band, and at the same time the creasing elements Il and I2 function to crease the portion of the band which is next to be severed. Fig. 11 shows a portion of the band or strip 33 -With creases 19 and 80 formed therein, and with the line of the next cut indicated at 8l. Fig. 12 shows one of the slot insulation members 82 formed by the device, said member having transverse-creases 19 and 80 therein.

As mentioned above, the stop-carrying arm M) is deiiectible to permit each cut member to fall freely. As shown in Fig. 8, theY movable knife member 5B is beveled at S3' for engagement with the cone element 5l. After the severing operation is completed-the portion 83 of the movable knife element'engages the cone 5i to cam the arm 40 outwardly to a position such as shown in dot-and-dash outline in Fig.. 2. This frees the cut portion of the tape or strip, permitting it to fall. As the movable knife element 59 is raised, the arml 40 ispermitted to return to its operative position under the impetus of its biasingspring41; Y'

It will be apparent from the foregoing description that the device is fully adjustable so that it may be used to produce slot insulation members of different sizes and with the creases properly located therein; With the device adjusted for the production of slotY insulation members of a particular size, the operator may actuate the device very rapidly to produce such members at a high rate.

While a preferred embodiment of the invention has been illustrated and described, it will be apparent that the invention is not limited thereto but is capable of various modifications.

especially with respect to structural details.

We claim:

l. In a device for cutting and forming slot insulation members from aband or strip of insulation material, a support structure over which said band may be moved to cut and form said members therefrom, stationary and movable blade members extending transversely of said support structure to cut said band, a pivoted arm extending from one side of said support structure beyond said blades in the direction of movement of said band, means biasing said arm to normal position, stop means on said arm extending laterally therefrom and engageable by the forward end of said band, and means on the movable blade member to deflect said arm in a direction to free each cut and formed member.

2. In a device for cutting and forming slot insulation members from a band or strip of insulation material, a support structure over which said band may be moved to cut and form said members therefrom, stationary and movable blade members extending transversely of said support structure to out said-band, a pivoted arm extending from one side of said support structure beyond said blades in the direction of movement of said band, a spring biasing said arm to normal position, stop means on said arm'extending iaterally therefrom and engageable by the forward end of said band, and means on the movable blade member to deflect said arm in a direction to free each cut and formed member.

3. 1n a device for cutting and forming slot insulation members from a band or strip of insulation material, a support structure over which said band may be moved to cut and form said members therefrom, stationary and movable blade members extending transversely of said support structure to out said band, a pivoted arm extending from one side of said support structure beyond said blades in the direction of movement of said band, means biasing said arm to normal position, stop means on said arm extending laterally therefrom and engageable by the forward end of said band, cam means on said arm, and means on the movable blade member engageable with said cam means during successive operations of the device to deiiect said armin a direction to free each cut and formed member.

4. In a device for cutting and forming slot insulation members from a band or strip of insulation material, a support structure over which band may be moved to cut and form said members therefrom, stationary and movable blade members extending transversely of said support structure to cut said band, a pivoted arm extending from one side of said support structure beyond said blades in the direction of movement of said band, means biasing said-arm to normal position, stop means on said arm extending laterally therefrom and engageable by the forward end of said band, a cone-shaped element on said arm, and means on the movable blade member engageable with said element during successive operations of the device to deiiect said arm in a direction to free each out and formed member.

5; In a device for cutting and forming slot insulation members from a band or strip of insulation material, a support structure over which said band may be moved to cut and form said members therefrom, guide means on said support structure having a surface engageable by a side edge of said band, stationary and movable blade members extending transversely of said support 

